But you've indefinitely deferred a large tax bill. 

Taxes - keep at least  7-10 years hard copy (or indefinitely if electronic)Insurance policies - keep current and 1-2 year's past policiesBank statements?

If you use the personal car, make sure to keep detail record so that CPA can prorate the expenses between personal and business.This can include- oil changes, Maintenance, gas, repairs, parking, tolls, and depreciation.

What would be the best practise in such a scenario to make sure this won't be an issue once we move in. Definition

Thirdly, it's purely speculation, but if you are willing to invest and hold it indefinitely, maybe one of these days it will be worth more.

If you use the personal car, make sure to keep detail record so that CPA can prorate the expenses between personal and business.This can include- oil changes, Maintenance, gas, repairs, parking, tolls, and depreciation.

As long as you continue to hold or as long as you 1031 whenever you sell you an defer those taxes indefinitely. 

@John Warren @Natalie Schanne @John ThedfordAlso, for MLS access, I know a few realtors - couldn't they syndicate the listings my way for an indefinite period?

In my opinion (and you know what they say about opinions) a great first home purchase is one that gives the purchaser three excellent options after the first year or two:1) The option to continue living there happily, indefinitely, at low relative cost.2) The option to retain the property as a cash flowing rental. 3) The option to sell the property for a hefty (after-tax) capital gain.Of course, option three is at least somewhat dependent on the market, but still, we can make decisions to increase our odds of achieving that outcome. 

The expectation is that appreciation will continue indefinitely.